Fitossociologia de uma área de cerrado denso na RECOR-IBGE, Brasília-DF

Abstract

This survey was conducted within a randomized block experiment set up in the RECOR – DF aiming to study the effect of fire in the cerrado. The sampling was conducted prior to the application of any treatments to assess the original status of the cerrado denso (dense savanna woodland) at the site. All woody individuals plus non-woody Velloziaceae over 5cm diameter were included in the sample which consisted of five 1000m2(20 x 50m) plots. Height and diameter at 30cm from the ground level were measured. There were 982 individuals belonging to 63 species and 34 families. Around 47% of the families contained just one species. Only 16 species occurred in all plots. Alfa diversity was high (H’= 3.53) and Sørensen’s Similarity Index was high between the plots. Sclerolobium paniculatum, Eremanthus glomerulatus, Schefflera macrocarpum, Ouratea hexasperma, Vochysia thyrsoidea, Guapira noxia, Caryocar brasiliense, Vellosia squamata, Qualea grandiflora and Emmotum nitens had the highest IVI. Density and basal area were 1964 and 13.28 m2/ha, respectively. Diversity was similar to that found for several areas of cerrado sensu stricto in the region, but density and basal area were higher than at most sites.